Ka-waveband laminated thin-film ferrite microstrip circulator

Abstract

The invention discloses a Ka-waveband laminated thin-film ferrite microstrip circulator. The Ka-waveband laminated thin-film ferrite microstrip circulator comprises a dielectric substrate, a first ferrite thin-film layer, a dielectric thin-film layer and a second ferrite thin-film layer which are formed on the dielectric substrate in a coating technology, and a microstrip line arranged on the second ferrite thin-film layer, wherein the microstrip line serves as a conductor circuit of the circulator to be connected with an external circuit; the dielectric thin-film layer is made from a material with thin-film adhesiveness, and the relative dielectric constant of the dielectric thin-film layer is lower than that of the first ferrite thin-film layer and that of the second ferrite thin-film layer. The purposes of improving the problem that the ferrite single-layer thin film is easy to break, reducing the difficulty of the coating technology and also improving the circulation effect of the circulator are reached by changing the structural form of the ferrite thin film. Experimental result indicate that the return loss, isolation, insertion loss and operation bandwidth of the circulator are obviously improved through the dielectric layer which is appropriate in thickness and low in relative dielectric constant.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, and relates to a Ka-band laminated film ferrite microstrip circulator. Background technique [0002] Ferrite circulator is a kind of microwave ferrite device. In radar, communication and other equipment systems, it is generally used as a shared device for signal reception and transmission. In the signal transmitting and receiving system, the ferrite circulator can isolate the input and output signals, and also has the functions of signal amplification, decoupling and matching. The development trend of modern communication and radio frequency technology is that microwave ferrite devices must develop in the direction of miniaturization, integration and light weight, so the ferrite circulator with microstrip line structure has become the focus of research, and the iron The application of oxygen film technology to circulators is a reasonable and effective method to reduce the size and weig...

AI Technical Summary

Problems solved by technology

However, in the production of ferrite thin films, the film will break and the performance of the film will decrease as the thickness of the film increases. This problem seriously restricts the development of thin film devices.

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